Automatic firearm



Aug- 11, 1931- y k. HEINEMANN 1,818,890

AUTOMATIC FIREARM Filed NO v. 27. 1929 www Patented Aug. ll, 1931A UNITED STATE-s PATENT orFlC-a KARL HEINEMANN, OF DUSSELDORF, GERMANY, ASSIGNOR T0 RHEINISCHE METALL- WAAREN- UND MIASCHIllQ'IEll'IF'AIBRIK,l 0F DUSSELDORF-DERENDOBF, GERMANY, lA

CORPORATION 0F GERMANY AUTOMATIC FIBEARII Application ed November 27, 1929, Serial No. 410,201,316. in Germany September 27, 1929. y

Automatic iirearms are usually equipped with interchangeable magazines, so that, when a magazine is empty, a full one can be substituted. According to the present invention, the gun is also constructed to receive interchangeable magazines, but is also provided with a mechanism, which is old in itself, to automatically'secure the breech block in the open position when the magazine is empty, and with an opening in the casing to introduce. filled cartridge container, such as a clip, in front of the magazine mouth. In this way, ammunition can be supplied to the weapon either by the introduction of a freshly-filled magazine Aor by filling the magazine already in the gun directly from cartridge clips, so that interchangeable magazines or only strip ammuni` tion are available for use according to the existing conditions.v The locking bolt, in the latter case, prevents any premature closing of the opened breech, so that the recharging of the magazine in the gun can proceed without interference.

An embodiment of the invention is illustrated in the accompanying drawings, in which:

Figure 1 is a longitudinal sectional plan view, and

Fig. 2 is a partial side elevation showing the shell ejector opening.

In the gun casing a, a cartridge magazine b is, laterally inserted and this magazine is locked against displacement by the bolt b3, in the `usual way. A nose b2 on the slide b1 of the emptied magazine holds the longitudinally-slidable breech block c in the open position. The spring-pressed magazine lockbolt b3 is so connectedA to a second breechblock latch, slidable by the hand piece b4, that, in the position illustrated, the bolt b3 holds the magazine b immovably, while 'the breech lock b5 is released, and, in the second position of the hand latch b4, both locks b3 and b5 are operative to hold the breech open and the magazine locked; finally, when the hand latch b4 is thrown up into a third position, only the breech' block c is locked against forward movement by the lock bolt b5, while the bolt b3 has released the magazine b for removal from the gun. The shell ejector d is mounted in the casing a, the breech block o having a longitudinal slot c in which/said ejector slides. In the head of the breech block is the transversely movable, spring-pressed claw e, which can be swung outwardly, as usual, a longitudinallymovable slide e at the end of the back travel of the breech block to disengage the shell, drawn out of the barrel by said block. v

The supply of ammunition to the gun can be made by interchanging the magazine b. lVhen the latter is empty, its slide b has engaged the breech block c in the-open position. By swinging the hand latch b4, the magazine being still locked, the bolt b5 is first'moved into the rest provided' in the block c and then the lock bolt b3 is retracted from behind the holding nose of the magazine, which can now be removed, whereupon the bolt b5 becomes operative to hold the breech retracted, until a fresh-filled magazine has been inserted in the gun. Only 'after this locking by b3 does the bolt b release the breech-block, which then slides forwardly and feeds the irst shell from the magazine intothe barrel.

The foregoing described combined breech and magazine lock, which, when a new mag- Yazine is to be substituted, only permits the `breech to move forwardly after the insertion and locking of the new magazine, is also important in connection with the second type of ammunition supply-by 'cartridge containers or clips. In this case, the empty magazine remains in the locked position in the gun, and the breech block o is held retracted by the slide b. Then a clip f, filled with cartridges g, is inserted through the long shell ejector -opening a opposite the magazine mouth in the casing, the forkshaped front end e2 of the slide e", on the breech head serving for such insertion. In the inserted position, the clip f engages behind a nose d of the ejector d and thereby prevents the breech block from sliding forwardly, after the shells, conveyed from the clip into the magazine e by finger pressure, have pushed the slide b back from the breech head. By the drawing out of the 35 Y- I firearm bythe removable ma azine or said emptied clip f, the breech c slides forwardly an inserts a shell into the barrel.

B ut also when the ma azine b holds more shells than are ,carried y a clip, or when the former still containsa number of shells the hand latch b* can be laced in its central position, the breech bloc c being retracted,

so that the bolt b holds the magazine locked and the bolt b holds the breech locked. Then the breech remains held in rear position under tension, after the slide b is out of breech-lockin position, and the inserted clip f' does not ave to serve as such lock. The magazine b can then be filled with several cartridge clips introduced successively. I claim as my 1nvention:- '1 1. An automatic firearm comprisin ing having a recess therein; a nreec ai easblock zin the casin a removable magazine associated with t e casing; and. means' for? automatically retaining the breechblock in opened position When.v the Vmagazine is empty, said recess being in frontfsofthe magazine mouth and being adaptedfffor the insertion of a cartridge containergg'so that ammunition can be supplied toi the'rearm either by changing the magazine-for Aby filling the magazine in the irearni ;yvith cartridge containers. 1 E,

2; An a tomatic firearm comprising a c asing having a recess therein; and-a removab e'magazine associated withvthe c'asin op- A posite'Y to the recess, said recessvbeing a aptwith the casing an ed for.y the insertion of a cartridge clip so that ammunition can be supplied to the ma'razine, in its position in t e casmg, can blei led with ammunition from a cartridge c In a magazine the combination retractable breech block, of means acting automatically to hold said block retracted when the magazine '1s empty; and an additional magazine and breech block -lock comprising cooperating members adapted to lock the magazine alone or the breech -block alone or bot the magazine and breech block. y i Y In testimony whereof, I ailix my signature. 

